Effects of Irrigation and Nitrogen Fertilizer Input Levels on Soil -N Content and Vertical Distribution in Greenhouse Tomato (Lycopersicum esculentum Mill.)

Figure 1

The effects of different irrigation and fertilization on soil -N content were varied by soil depth in 2012: (a) 25 days after transplanting, (b) 43 days after transplanting, (c) 59 days after transplanting, and (d) 117 days after transplanting. W1: 100%: W2: 75%, and W3: 50%; F1: N240–P₂O₅120–K₂O150 kg hm⁻²; F2: N180–P₂O₅90–K₂O112.5 kg hm⁻²; and F3: N120–P₂O₅60–K₂O75 kg hm⁻².

(a)

(b)

(c)

(d)