12d65980_ening_Tips_and_Plants___How_to__Plant_Symptoms
[Deficiency] Nitrogen [Plant Uses] Chlorophyll, proteins, genetic material, hormones, and other chemicals [Sources] Fish, alfalfa, or blood meal; green manures [Plant Symptoms] 
Slow growth Leaves are uniformly yellow-green Cucumbers are pointed at the tips
Organic Gardening Tips and Plants - How to