Soft - ridged bench terrace design in hilly loess region
2.
3 . when apply fertilizer quantity is 1 . 5 to 2 times to the present quantity on bench terrace , wheat output raise obviously . but the best application rate is 1 . 5 times to the present quantity ( namely 75 kg nh4hco3 + 150 kg ca ( h2po4 ) 2 per mu )
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