İlaçlama işleminde GNSS esaslı traktör otomatik dümenleme sistemlerinin etkinliği

Öz

Amaç: Bu çalışmada, traktör otomatik dümenleme (OD) sistemi ile ve manuel dümenleme ile yapılan ilaçlamada yan yana paralel geçişlerdeki örtüşme ve boşluk miktarları karşılaştırılmıştır.

Yöntemler ve Bulgular: Veriler, OD sistemlerinin gerçek çiftçi koşullarındaki performansını değerlendirmek için 13 çiftçi tarlasından (pamuk, mısır ve yerfıstığı) elde edilmiştir. İlaçlama sırasında traktörün izlediği noktaların koordinatları kayıt altına alınmış, bu noktalardan oluşturulan haritalar üzerinden ortalama örtüşme ve boşluk hata değerleri (Hataların ortalama kare kökü; Root mean square error: RMSE) belirlenmiş ve analiz edilmiştir. Tarlalar arasındaki değişkenlik de incelenmiştir. RMSE değerinin çiftçilerin sırta toprak işleme, ekim ve ilaçlama işlemlerinin her üçünde OD kullandığı (RTK düzeltme sinyaliyle) tarlalarda en düşük değerde (7.5 ± 1.7 cm) olduğu gözlemlenmiştir. Çiftçilerin sadece sırta toprak işlemeyi OD sistemiyle, ekim ve ilaçlamayı manuel olarak (OD kullanmadan) yaptığı tarlalarda ortalama hata değerinin daha yüksek olduğu tespit edilmiştir (CORS-GSM: 46.1 ± 6.5 cm, SBAS: 76.5 ± 13.9 cm). Sırta toprak işleme, ekim ve ilaçlamanın hepsinin manuel dümenleme ile yapıldığı tarlalarda ise ortalama hata değerinin en yüksek düzeyde olduğu (100.8 ± 27.8 cm) görülmüştür (p<0.05). Manuel ilaçlama durumunda (OD kullanılmadan) ortalama hata değerinin OD kullanılan tarlalara göre önemli derecede daha yüksek olduğu bulunmuştur (p<0.05).

Genel Yorum: OD sistemlerinin, ilaçlamada yan yana paralel geçişlerdeki ortalama ötüşme ve boşluk hata değerini azaltmada yararlı olduğu tespit edilmiştir. Ancak, çiftçilerin çoğunun OD sistemini sadece toprak sırtı oluşturmada kullandığı, ekim ve ilaçlamayı toprak sırtlarını referans alarak OD kullanmaksızın elle dümenleme ile yaptığı belirlenmiştir. Bu durumun temel nedenlerinden biri, OD sistemlerinin maliyetinin yüksek olması ve çiftçilerin tüm traktörlerini OD sistemi ile donatacak mali gücünun olmamasıdır. OD sistemlerinin sadece sırta toprak işlemede değil, aynı zamanda ilaçlamada da kullanımının örtüşme ve boşluk hatalarını azalttığı ve OD kullanımının yararını arttırdığı gözlenmiştir. OD'den elde edilen fayda düzeyinin çiftçiden çiftçiye değişebildiği tespit edilmiş olup, daha yüksek düzeyde faydalar elde etmek için çiftçilerin OD sistemlerini uygun ekipman ayarlarıyla dikkatli bir şekilde kullanmaları gereklidir.

Çalışmanın Önemi ve Etkisi: OD sistemlerinin ilaçlama işleminde uygun şekilde kullanımı, örtüşme ve boşluk miktarında azalmaya bağlı olarak tarım ilacı kullanımında azalma, bitkiler üzerinde daha az toksik etki, ürün üzerinde daha düşük miktarda pestisit kalıntısı, daha az çevre kirliliği, daha düşük ilaçlama süresi, daha düşük yakıt tüketimi ve daha düşük işçilik masrafı potansiyeline sahiptir.

Anahtar Kelimeler

• GNSS,otomatik dümenleme,ilaçlama,örtüşme,boşluk,hata

Effectiveness of GNSS-based tractor auto steering systems in crop spraying

Abstract

Aims: This study aimed to compare pass-to-pass overlaps and spacings in adjacent parallel passes in spraying with and without tractor automatic steering (AS).

Methods and Results: The data were obtained from 13 farmer fields (cotton, corn and peanut) to assess the performance of AS systems in real farmer conditions. Root mean square errors (RMSE) of overlaps and spacings were determined on the maps generated from the coordinates of the tractor recorded while spraying. Variations between the fields were also examined. The RMSE was lowest (7.5 ± 1.7 cm) in the fields on which farmers used AS (with RTK correction signal) in all three operations of tillage, sowing and spraying. RMSE values were comparatively higher for the fields on which farmers used AS only in ridge tillage but not in sowing and spraying (CORS-GSM: 46.1 ± 6.5 cm, SBAS: 76.5 ± 13.9 cm). The fields with manually-steered ridge tillage, sowing and spraying (all three) had the highest RMSE value of 100.8 ± 27.8 cm (p<0.05). The mean RMSE in the manual spraying (without AS) were found to be significantly higher than those using the AS (p<0.05).

Conclusions: AS systems were found to be beneficial in reducing the mean pass-to pass overlap and spacing errors (RMSE) in spraying. However, most of the farmers used AS only in soil ridge tillage and made the spraying without AS by referencing marking flags and/ or soil ridges which were formed using AS. Main reason of this is the high cost of the AS systems and farmers cannot afford to equip all of their tractors. The use of AS systems not only in ridge tillage but also in planting and spraying reduced the errors and increased the benefit of AS usage. The level of benefit from the AS could change from farmer to farmer; thus, farmers should use the AS systems carefully with appropriate equipment settings to obtain a higher level of benefits.

Significance and Impact of the Study: Appropriate use of AS systems in spraying offers benefits to reduce overlap and gaps and the amount of pesticides resulting in lower amount of environmental pollution and pesticide residues on crops, lower application time, lower fuel and labor consumption.

Keywords

• GNSS,auto steering,spraying,overlap,spacing

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