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4 > Image 4 of Kentucky farm and home science, vol. 3 No. 2 spring 1957

Part of Kentucky Agricultural Experiment Station

Symptoms indicate that some of the states soils 1nay lack A-__ one of the minor elements needed for plant growth, causing . ` 1 Zinc - deficient Corn 1n Kentucky . I By H. F. MASSEY ., 1 Zinc, one of the minor elements, is not generally A number of other things can cause corn to have li considered to be a necessary fertilizer in Kentucky. symptoms similar to those of zinc deficiency. Root A However, it appears that we may have to consider aphids and also some bacterial diseases can cause such 1 zinc fertilization for best production of corn on symptoms. Some corn plants from numerous locations some fields. over the state, showing the above-described condition, were found to be suffering from aphids and bacterial * What is the Problem? diseases. However, other plants were apparently not I 1 A number of corn fields have been observed in effected by either Of those cauSS 4 Kentucky over the past several years in which the How Ccin Deficiency Be Dicgncscdiv _ Cllllh OY ll Pall lll ll WHS ll)PlYlltlY ZlllC(lflCllll Analysis of the plant is often helpful in diagnosing V The affected plants usually showed a yellow streaking n (iHCiucy_ Plants Showing the Syinntnins Stut(1 r_ Wlwll 8 lll lll llll$ lull- lilll` lll leaf UPS and above were usually found to have a lower coucentra- I margins became purple and, if the corn was severely tion Of Zinc tlsiau ncaitny ninntg Hnwcvcn Scvciciy { g affected, a broad white stripe developed down each dcficicnt ijlaiits sninctinics contnincd n highcr c(,n_ side of the leaf. The corn was usually stunted, and ccntmtinn nf Zinc tilan nnndciicicnt pinntS_ pinnts T ll1 Dllll <>ll`ll Sl<>w<r<>w OY PllYPl (ll$ showing only mild deficiency symptoms usually had ef C()l()I`2l.Tl()ll lll Tll( l()\V(l` ll()(l(S. tll( C()l`ll \V&T.S VCl`y the i()rSt C()iiCntlatiO of ZinC_ sr-vi-rely affected. it usually l'(Ill2llll((l SlllIll(n1Nc 1957 gt {